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MECHANICAL MDVEMENT. No.595,968. Patented Deo. 21, 1.897.-

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2 simens-sheet 2. W. P. PARSONS. l MECHANICAL MOVEMENT.

No. 595,968. Patented Deo. 21,1897.

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UNITED STATES ATENT OFFICE.

WILLARD POPE PARSONS, OF HOOSICK FALLS, NEW YORK.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 595,968, dated December 21, 1897.

Application filed April 14, 1896. Serial No. 587,571. (No model.)

T0 all whom t may concern.-

Be it known that I, VILLARD POPE PAR- SONS, of Hoosick Falls, in the county of Rensselaer and State of New York, have invented a new and useful Improvement in Mechanical Movements and Incidental to it the Transmission of Power; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents an elevation of my improvement in Operative condition; Fig. 2, an elevation of yoke and gear. Fig. 3 is an ele- Vation of the cylinder operating the saine with the sleeve broken off.. Fig. 4 represents in elevation my device as applied to a hoisting apparatus. Fig. 5 represents a view in elevation taken on the line X X, Fig. 4. Fig. 6 is a vertical cross-section of Fig. 4, taken on a plane passing through the axes of the gears. Fig. 7 is a sectional elevation of Fig. 6, taken on the line y y, Fig. 6.

The same letters in the several figures represent the same parts.

The nature and object of my invention are to provide a mechanism by which motion can be transmittedl only by the application of power to a single piece and in no wise can motion be transmitted from the driven to the driving side. This improvement is valuable as applied to hoists and various machines and vehicles in which l the driving power is suddenly cut off and the mechanism' is required der II is of larger diameter than the other part and forms a bearing for a second gearwheel D. .The two gear-Wheels B and D are furnished with teeth to mesh together. The

wheel D is supported in whatI term a ringyoke F, the wheel D being :fitted with two trunnions or hubs E opposite each other and which fit into and are held in boxes on the ring-yoke. The ring-yoke is supported by two trunnions or hubs G opposite each other and on a line at right angles to the line 0f the trunnions E. Trunnions G work in bearings or boxes permanently fixed to the main frame of the hoist, vehicle, or machine, as may be required, which form a support for the device. To the sleeve of cylinder H-that is, the part where the axis is parallel to shaft A*is applied the driving power through pulley, hand-wheel, armature, or any other approved method. I have shown a hand-wheel in Figs. 4, 6, and 7;

The bevel-gear D being mounted on the inclined cylinder, as described, and so supported by the trunnions E, turning in the ring-yoke, and the ring-yoke beingsupported by the trunnions Gon the frame, when power is applied to the cylinder H to lrotate it about the axis of shaft A the gear D will take a wabbling instead of a rotary motion and some of its teeth will be in mesh with the teeth on wheel B, and consecutive wabbling movements ofthe wheel D will engage its teeth one after the other with teeth yin wheel B. The wheel D has a greater number of teeth than wheel B. Consequently the wheel B will have rotated when all the teeth in D have been engaged a distance corresponding to the excess of teeth in D and turn the shaft A with its load. l

In Figs. 4 and 6 I have shown in a hoisting-machine a sleeve K, fastened to shaft A, over which a chain can be passed to raise the weight to be hoisted.

I do not deem it necessary to describe any of the other forms of the application of this mechanical movement for transmitting power. While it is particularly adapted, as shown in the drawings, to a hoisting-machine, it is evident that modifications in construction of different well-known mechanical devices can be used to apply the same to other purposes for communicating motion and force.

When motion of wheel D is arrested by throwing off the belt, stopping electric current or other' device applied to cylinder I-I, and force is still left to turn shaft A-for instance, when a weight being raised is suspended-this force cannot result in turning ICO' shaft A, and the mechanism will all remain in a stale of rest, as the force, While it tends to rotate Wheel B, and therefore Wheel D, in a reverse direction, will be resisted by the gimbabjoint forni of connection of Wheel B.

Having thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is-

The combination of a, shaft, two gears thereon diiering as to their number of teeth and meshing together, a cylinder upon which 

